(a) Points upon which the trial judge is requested to charge the jury shall be so framed that each may be completely answered by a simple affirmation or negation. Attorneys shall hand copies of requested points for charge to the trial judge and to the opposing attorneys before the closing addresses to the jury are begun. A requested point for charge that was presented to the trial judge becomes part of the record when the point is read into the record, or filed in the office of the prothonotary prior to filing a motion for post-trial relief regarding the requested point for charge.